Nix some client-sided sounds, control them from the server

this is a necessary step to knock out the implicit assumption that every player is using the same protocol.

src/network/mcpe/handler/InGamePacketHandler.php

@@ -754,6 +754,14 @@ class InGamePacketHandler extends PacketHandler{
 	}
 
 	public function handleLevelSoundEvent(LevelSoundEventPacket $packet) : bool{
+		//TODO: we want to block out this packet completely, but we don't yet know the full scope of sounds that the client sends us from here
+		switch($packet->sound){
+			case LevelSoundEventPacket::SOUND_LAND:
+			case LevelSoundEventPacket::SOUND_FALL:
+			case LevelSoundEventPacket::SOUND_FALL_SMALL:
+			case LevelSoundEventPacket::SOUND_FALL_BIG:
+				return true;
+		}
 		$this->player->getWorld()->broadcastPacketToViewers($this->player->getPosition(), $packet);
 		return true;
 	}

src/network/mcpe/protocol/AddActorPacket.php

@@ -44,6 +44,7 @@ class AddActorPacket extends DataPacket implements ClientboundPacket{
 	 * TODO: remove this on 4.0
 	 */
 	public const LEGACY_ID_MAP_BC = [
+		-1 => ":",
 		EntityLegacyIds::NPC => "minecraft:npc",
 		EntityLegacyIds::PLAYER => "minecraft:player",
 		EntityLegacyIds::WITHER_SKELETON => "minecraft:wither_skeleton",